Title: Diastereoselective synthesis of (aryloxy)phosphoramidate prodrugs
Authors: Roman, Cristina Arbelo ×
Wasserthal, Philip
Balzarini, Jan
Meier, Chris #
Issue Date: Sep-2011
Publisher: Wiley-VCH
Series Title: European Journal of Organic Chemistry vol:2011 pages:4899-4909
Abstract: The first diastereoselective synthesis of aryloxyphosphoramidate prodrugs of 3′-deoxy-2′,3′-didehydrothymidinemonophosphate (d4TMP) was recently reported. The synthetic approach utilized the chiral auxiliary (S)-4-isopropylthiazolidine-2-thione (2). For this strategy, a stereochemically pure phosphorodiamidate intermediate was needed. The diastereoselective formation of this key compound was investigated by using different phenols and L-alanine methyl or benzyl ester. Generally, the reaction with 3- or 4-substituted phenols led to significantly better diastereoselectivities compared to their 2-substituted counterparts. Moreover, variation of the ester group in the amino acid residue resulted in no significant differences with regard to the obtained diastereoselectivity. From the reported results, a model for the transition state was elaborated. Finally, eight new (SP)-arylphosphoramidates were synthesized with very high diastereoselectivities (up to ≥ 95 % de) and tested for their anti-HIV potency, showing a tendency for higher antiviral activity from the (SP) diastereomers.
ISSN: 1434-193X
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Laboratory of Virology and Chemotherapy (Rega Institute)
× corresponding author
# (joint) last author

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